<template>
    <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
        <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <pre>
              <el-row :class="['bd-bottom vcenter', i1 == 0 ? 'bd-top' : '']" v-for="(item1, i1) in scope.row.children" :key="item1.id" :index="i1">
                <!-- 渲染一级权限 -->
                <el-col class="vcenter" :span="4">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                  <i class="el-icon-caret-right iconCenter"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="20">
                  <!-- 通过for循环嵌套渲染二级权限 -->
                  <el-row :class="['vcenter', i2 == 0 ? '' : 'bd-top']" v-for="(item2, i2) in item1.children"
                   :index="i2" :key="item2.id">
                    <el-col class="vcenter" :span="5" style="margin-top: -16px;">
                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                      <i class="el-icon-caret-right iconCenter"></i>
                    </el-col>
                    <el-col :span="19" style="white-space: normal; padding: 10px 0; margin-bottom: 14px;">
                      <el-tag type="warning" v-for="(item3, i3) in item2.children" :index="i3"
                       :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </pre>
          </template>
        </el-table-column>

        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightsDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" ref="treeRef" show-checkbox node-key="id"
       default-expand-all :default-checked-keys="defKeys"></el-tree>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 控制是否显示 分配权限对话框
      setRightDialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 树型结构属性
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值
      defKeys: [],
      roleId: ''
    }
  },
  created () {
    // 获取所有角色的列表
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }

      this.rolesList = res.data
    //   console.log(this.rolesList)
    },
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('权限删除失败')
      }

      // 权限删除后 展开行不会关闭
      role.children = res.data
    },
    // 展示 修改权限 对话框
    // async showEditRgihtsDialog (id) {
    //   const { data: res } = await this.$http.put(`roles/${id}`)
    //   if (res.meta.status !== 200) {
    //     return this.$message.error('查询用户信息失败')
    //   }

    //   this.editForm = res.data
    //   this.editDialogVisible = true
    // },
    // 展示分配权限的对话框
    async showSetRightDialog (roles) {
      this.roleId = roles.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('权限数据获取失败')
      }

      this.rightsList = res.data

      // 递归获取三级节点的Id
      this.getLeafKeys(roles, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式， 获取角色下所有三级权限的id， 并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含 children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听配置权限的对话框
    setRightsDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }

      this.$message.success('分配权限成功')
      this.getRolesList()

      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin-top: 7px;
  margin-right: 4px;
}

.bd-top {
  border-top: 1px solid #c5c2c2;
}

.bd-bottom {
  border-bottom: 1px solid #c5c2c2;
}

.vcenter {
  display: flex;
  align-items: center;
  margin-left: 8px;
}

.iconCenter {
  padding-top: 6px;
  font-size: 14px;
}
</style>
